Showing 1–8 of 8 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Katsuhiko Yamaguchi | Toyota | 6 |
| 1 | Hiroshi Ando | Denso | 6 |
| 3 | Yoshihiko Kohmura | Ngk Spark Plug Co. | 2 |
| 3 | Hideyuki Tanaka | Mitsubishi Electric | 2 |
| 3 | Naohiko Kato | Toyota Central R&D Labs | 2 |
| 3 | Hitoshi Yamaguchi | Denso | 2 |
| #7 | Shigenori Yamauchi | Denso | 1 |
| #7 | Takao Tsuda | Unknown | 1 |